CN207111202U

CN207111202U - A kind of muffler for motor and engine

Info

Publication number: CN207111202U
Application number: CN201721044706.3U
Authority: CN
Inventors: 徐遗庚
Original assignee: Changzhou Better Power Machinery Co Ltd
Current assignee: Changzhou Better Power Machinery Co Ltd
Priority date: 2017-08-21
Filing date: 2017-08-21
Publication date: 2018-03-16
Anticipated expiration: 2027-08-21

Abstract

A kind of muffler for motor is the utility model is related to, including：Shell body, pass through first, second dividing plate set in the shell body, its inner chamber is divided into first, second, and third expansion cavity successively, the air inlet pipe with shell body, escape pipe are connected wherein described first, second expansion cavity respectively, and the first expansion cavity is connected with the 3rd expansion cavity by center hush pipe, and the 3rd expansion cavity is vented to the second expansion cavity by second partition, tail gas sequentially enters the first, the 3rd and second expansion cavity noise reduction step by step, good muffling effect, exhaust resistance is small, simple in construction.

Description

A kind of muffler for motor and engine

Technical field

It the utility model is related to engine manufacturing technology field, and in particular to a kind of muffler for motor and engine.

Background technology

At present in available engine silencer, engine exhaust, which is eliminated the noise, mainly passes through a straight tube or bend pipe, will arrange Conductance flows to a larger inner chamber, forms an expansion chambers, and by this larger expansion chambers, exhaust noise is reduced into one Point, additionally by the sound absorber or material on the inner chamber wall of silencer, further to eliminate the noise, such noise elimination structure ratio More complicated, manufacturing process is cumbersome, and soundproof effect is poor, and exhaust resistance is high, influences the circulation effect of exhaust, is unfavorable for engine Can, the phenomenon that the sound-absorbing material on internal chamber wall face comes off often occurs during such silencer use, so existing knot Structure can not meet the requirement of engine.

Utility model content

The purpose of this utility model is to provide a kind of muffler for motor, to improve noise reduction.

In order to solve the above-mentioned technical problem, the utility model provides a kind of muffler for motor, including：Shell body, lead to First, second dividing plate set in the shell body is crossed, its inner chamber is divided into first, second, and third expansion cavity successively, its Described in first, second expansion cavity the air inlet pipe with shell body, escape pipe connect respectively, and the first expansion cavity and the 3rd expansion cavity Connected by center hush pipe；

After tail gas enters the first expansion cavity by air inlet pipe carries out preliminary noise reduction, the 3rd expansion is entered by center hush pipe Chamber carries out noise reduction again, then passes through second partition and carries out final noise reduction into the second expansion cavity, most afterwards through shell body escape pipe Discharge.

Further, some silencer hush pipes are installed on the second partition so that tail gas by silencer hush pipe from 3rd expansion cavity diffuses to the second expansion cavity.

Further, the second partition is sound gobo, and some bloops are distributed on the sound gobo, so that tail gas is worn Cross bloop and diffuse to the second expansion cavity from the 3rd expansion cavity.

Further, the sound gobo uses sound-absorbing material；The bloop is tapered through hole.

Further, the shell body is stainless steel, and its surface of internal cavity is in fine undaform.

Further, the first partition uses refractory seals plate, and both side surface is sound-absorbing material.

Further, the inner chamber of the shell body is into ellipsoid；The center hush pipe is located at the inner chamber of shell body, and successively Through first, second dividing plate；And the both ends of the center hush pipe are respectively provided with the through hole that gas is flowed into, flowed out.

Another aspect, the utility model additionally provide a kind of engine, exhaust outlet or the exhaust flange installation of the engine Described muffler for motor.

The beneficial effects of the utility model are that the inner chamber of the shell body of muffler for motor of the present utility model is divided into First, second and the 3rd expansion cavity, tail gas sequentially enter the first, the 3rd and second expansion cavity noise reduction step by step, good muffling effect；First Expansion cavity is connected with the 3rd expansion cavity by center hush pipe, and the 3rd expansion cavity is vented to the second expansion cavity by second partition, Exhaust resistance is small, and has the advantages of simple in construction.

Brief description of the drawings

The utility model is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is the structure chart of muffler for motor of the present utility model；

Fig. 2 is the structure chart for the muffler for motor that second partition of the present utility model is provided with bloop；

In figure：Shell body 1, first partition 2, second partition 3, the first expansion cavity 4, the second expansion cavity 5, the second expansion cavity 6, Air inlet pipe 7, escape pipe 8, center hush pipe 9, bloop 10, through hole 11,14, stomata 12, silencer hush pipe 13.

Embodiment

The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram, Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.

Embodiment 1

As depicted in figs. 1 and 2, the present embodiment 1 provides a kind of muffler for motor, including：Shell body 1, by described The first partition 2 of setting, second partition 3, the first expansion cavity 4, the second expansion cavity 5 are divided into by its inner chamber successively in shell body 1 With the 3rd expansion cavity 6, wherein the air inlet pipe 7 with shell body 1, escape pipe 8 connect respectively for first expansion cavity 4, the second expansion cavity 5 It is logical, and the first expansion cavity 4 is connected with the 3rd expansion cavity 6 by center hush pipe 9.

First, second, and third expansion cavity is into being set up in parallel.

Specifically, after tail gas carries out preliminary noise reduction by air inlet pipe into the first expansion cavity 4, entered by center hush pipe 9 Enter the 3rd expansion cavity 6 and carry out noise reduction again, then pass through second partition 3 and carry out final noise reduction into the second expansion cavity 5, most pass through afterwards The escape pipe 8 of shell body is discharged.

Optionally, the shell body 1 such as, but not limited to uses stainless steel, and its surface of internal cavity is in fine undaform, And coating high temperature resistant heat insulation coating, such as, but not limited to high temperature reflective heat-insulation paint GN-302, the high temperature resistant heat insulation coating is not It is only high with base material bond strength, and there is effect of heat insulation.

The first partition 2 is refractory seals plate, and its base material is sound panel, preferably aluminium alloy force-bearing plate, or zinc-plated Force-bearing plate, both of which have the advantages of fusing point is high, and soundproof effect is good；The both side surface covering sound-absorbing material of the first partition 2, Such as, but not limited to air layer is left in the sound-absorbing porous material such as mineral wool, bottom, not only high temperature resistant, and can absorb low frequency and make an uproar Sound.

Therefore, when tail gas enters the first expansion cavity 4, the surface of internal cavity of fine undaform and the suction in the outside of first partition 2 Sound material can largely absorb the acoustic wave energy of injection, attenuation be played to sound wave, while the and can of first partition 2 prevents that noise is straight Erasure effect caused by tapping into the second expansion cavity 5 is bad.

Further, tail gas from the 3rd expansion cavity diffuse to the second expansion cavity embodiment include the following two kinds implement Mode.

The first embodiment is as follows：

As shown in figure 1, installing some silencer hush pipes 13 on the second partition 3, the silencer hush pipe 13 is worn Second partition 3 is crossed, connects second and third expansion cavity, and some through holes 14 are equipped with the both ends of the silencer hush pipe 13, so that Tail gas passes through the through hole 14 of the one end of silencer hush pipe 13 from the 3rd expansion cavity 6, into silencer hush pipe 13, and from noise elimination The through hole 14 of the other end of device hush pipe 13 diffuses to the second expansion cavity 5.

When tail gas flows through silencer hush pipe 13, the silencer hush pipe 13 is suitable to absorb the exhaust noise, to carry High noise reduction.

Second of embodiment is as follows：

As shown in Fig. 2 the second partition 3 is sound gobo, some bloops can be distributed on the sound gobo 10, the bloop 10 for example but is limited to be adopted as tapered through hole, and can used by the way of proper alignment arrangement Cheng Zhong, make tail gas in time through bloop 10 from the uni-directional diffusion of the 3rd expansion cavity 6 to the second expansion cavity 5.

In other embodiments, use tail gas from the 3rd expansion cavity to diffuse to the second expansion cavity with improve noise reduction its His diffusion way is also in the protection domain of the application.

As a kind of optional embodiment of shell body 1, the inner chamber of the shell body 1 is such as, but not limited to ellipsoid；Institute State center hush pipe 9 and be installed on the inner chamber of shell body 1, and sequentially pass through first, second dividing plate, and make the center hush pipe 9 Both ends be butted on respectively on the inside of the both ends of shell body 1, the both ends side wall of center hush pipe 9 is equipped with the through hole suitable for gas circulation 11；Optionally, the through hole 11 is such as, but not limited to slotted hole.

Further, the air inlet pipe 7 is connected with the exhaust outlet or exhaust flange of engine；

The escape pipe 8 is preferably hush pipe, and its one end is butted on the inner side of shell body 1, and is provided with the side wall of escape pipe 8 Some stomatas 12, escape pipe 8 is entered by the second expansion cavity 5 suitable for gas.

Embodiment 2

On the basis of embodiment 1, the present embodiment 2 provides a kind of engine, the exhaust outlet of the engine or exhaust Flange installs muffler for motor as described in Example 1.

Optionally, the shell body 1 of the muffler for motor is fixed on the engine by support.

Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people Member can carry out various changes and amendments in the range of without departing from this item utility model technological thought completely.This item is real The content being not limited to new technical scope on specification, it is necessary to which its technology is determined according to right Property scope.

Claims

A kind of 1. muffler for motor, it is characterised in that including：

Shell body,

By first, second dividing plate set in the shell body, its inner chamber is divided into first, second, and third expansion successively Chamber, wherein

The air inlet pipe with shell body, escape pipe connect first, second expansion cavity respectively, and the first expansion cavity and the 3rd expansion Chamber is connected by center hush pipe；

After tail gas enters the first expansion cavity by air inlet pipe carries out preliminary noise reduction, entered by center hush pipe into the 3rd expansion cavity Capable noise reduction again, then pass through second partition and carry out final noise reduction into the second expansion cavity, most discharged afterwards through shell body escape pipe.
2. muffler for motor according to claim 1, it is characterised in that

Some silencer hush pipes are installed, so that tail gas is expanded by silencer hush pipe from the 3rd expansion cavity on the second partition It is dissipated to the second expansion cavity.
3. muffler for motor according to claim 1, it is characterised in that

The second partition is sound gobo, and some bloops are distributed on the sound gobo so that tail gas through bloop from 3rd expansion cavity diffuses to the second expansion cavity.
4. muffler for motor according to claim 3, it is characterised in that

The second partition uses sound-absorbing material；

The bloop is tapered through hole.
5. the muffler for motor according to Claims 2 or 3, it is characterised in that the shell body is stainless steel, its Surface of internal cavity is in fine undaform.
6. muffler for motor according to claim 5, it is characterised in that the first partition uses refractory seals Plate, both side surface are sound-absorbing material.
7. muffler for motor according to claim 6, it is characterised in that

The center hush pipe is located at the inner chamber of shell body, and sequentially passes through first, second dividing plate；And

The both ends of the center hush pipe are respectively provided with the through hole that gas is flowed into, flowed out.
8. a kind of engine, it is characterised in that exhaust outlet or the exhaust flange installation of the engine are appointed just like claim 1-7 Muffler for motor described in one.